气候变化领域集成服务门户(CCPortal): Sources of concentric gravity waves generated by a moving mesoscale convective system in southern Brazil

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DOI	10.5194/acp-22-15153-2022
	Sources of concentric gravity waves generated by a moving mesoscale convective system in southern Brazil
	Nyassor, Prosper K.; Wrasse, Cristiano M.; Paulino, Igo; Sao Sabbas, Eliah F. M. T.; Bageston, Jose V.; Naccarato, Kleber P.; Gobbi, Delano; Figueiredo, Cosme A. O. B.; Ayorinde, Toyese T.; Takahashi, Hisao; Barros, Diego
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	15153
结束页码	15177
卷号	22 期号:23 页码:25
英文摘要	The studies on the sources of three concentric gravity waves (CGWs) excited by a moving mesoscale convective system (MCS) on the night of 1-2 October 2019 are investigated. These CGWs were observed using a hydroxyl (OH) all-sky imager, whereas the MCS was observed by the Geostationary Operational Environmental Satellite (GOES). Using 2D spectral analysis, we observed that the three CGWs have horizontal wavelength lambda(H) between similar to 30-55 km, phase speed c(H) similar to 70-90 m s(-1), and period tau similar to 7-12 min Using backward ray tracing, we found that two of the CGWs were excited from convective cores within the MCS. We also found that the epicenters of the two waves were close to the tropopause positions of the ray-traced paths and nearby convective cores. Regarding the source, we verified that on this night the tropopause was similar to -80 degrees C, which was similar to 10 degrees C colder than the days preceding and after the MCS and also colder than usually observed. Since the tropopause height and temperature are fundamental parameters underlying the analysis of the overshooting extent, we developed our own methodology to establish a reference tropopause that would enable a quantitative estimate of this parameter. Since the MCS (CGWs source) was moving, the overshooting convective cores were tracked in space and time. Using the tracking of the overshooting tops (OTs) in space and time with the aid of reverse ray tracing, we found that two out of the three CGWs were excited by the MCS, whereas the source of the remaining one was not directly associated with the MCS.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000892863500001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273220
作者单位	Instituto Nacional de Pesquisas Espaciais (INPE); Universidade Federal de Campina Grande; Instituto Nacional de Pesquisas Espaciais (INPE); Instituto Nacional de Pesquisas Espaciais (INPE); Instituto Nacional de Pesquisas Espaciais (INPE)
推荐引用方式 GB/T 7714	Nyassor, Prosper K.,Wrasse, Cristiano M.,Paulino, Igo,et al. Sources of concentric gravity waves generated by a moving mesoscale convective system in southern Brazil[J],2022,22(23):25.
APA	Nyassor, Prosper K..,Wrasse, Cristiano M..,Paulino, Igo.,Sao Sabbas, Eliah F. M. T..,Bageston, Jose V..,...&Barros, Diego.(2022).Sources of concentric gravity waves generated by a moving mesoscale convective system in southern Brazil.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(23),25.
MLA	Nyassor, Prosper K.,et al."Sources of concentric gravity waves generated by a moving mesoscale convective system in southern Brazil".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.23(2022):25.